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Year 11 - Maths

Non-linear distance-time graphs

Real-life graphs

Unit Summary

In this unit pupils expand upon knowledge developed in the linear graphs unit. Pupils are introduced to rates of change and the gradient of the tangent as a way of estimating the gradient of a curve.

Lesson Summary

You will learn to interpret non-linear distance-time graphs.

Key Notes

  • Speed may not always be constant.
  • Acceleration may not always be constant.
  • Depending on the variables, multiple graphs can represent the same journey.

Vocabulary To Learn

  • Speed: Speed is the rate at which something is moving. It is measured as the distance travelled per unit of time.
  • Acceleration: Acceleration is the rate of change of speed with respect to time.
  • Deceleration: Deceleration is the rate at which the speed of an object is decreasing.

Common Mistakes To Avoid

  • Pupils may think a horizontal line on a speed-time means the object is stationary.

3 Quick Questions (With Answers)

1. Solve this in steps: explain the method from this lesson and why each step matters.

Speed may not always be constant. Acceleration may not always be constant.

2. Use this key word in a maths sentence and explain it clearly. 'Speed'

Speed is the rate at which something is moving. It is measured as the distance travelled per unit of time. Use this word when showing your method, then check your final answer is reasonable.

3. Spot and fix this common maths mistake.

Mistake: Pupils may think a horizontal line on a speed-time means the object is stationary. Correction: The $$y$$ axis is plotting speed so a horizontal line means the speed has not changed in that time. But this can be at any speed. Pupils need to double check axes to know what sort of graph they are using.

More Lessons In This Unit

Browse all guides in the Year 11 Maths guide library.